package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.Banner;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;


@Controller
public class loginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(loginController.class);
    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @RequestMapping(path = "/register",method = RequestMethod.GET)
    //RequestMapping表示浏览器访问了服务器的代码，浏览器中输入了一个地址，访问了服务器
    public String getRegisterPage(){
        //导入thymeleaf依赖，访问的是resources的templates目录下，这时不需要加后缀。不导入依赖的话，访问的是static目录下
        return "/site/register";
    }




    @RequestMapping(path = "/register",method = RequestMethod.POST)
    //这里跳转的是templates下的内容,这里用return来获取。input的name属性和bean的变量名对应才能成功取到值
    //springmvc user封装到model里，页面直接可以用。confirmpassword从request里可以取到，用param即可
    public String register(Model model, User user){
        Map<String, Object> map = userService.register(user);
        if (map == null || map.isEmpty()){
            model.addAttribute("msg","注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("EmailMsg",map.get("EmailMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/register";
        }
    }
    @RequestMapping(path = "/login",method = RequestMethod.GET)
    public String getLoginPage(){
        return "/site/login";
    }


//激活链接拼写http://localhost:8080/community/activation/101/code
    @RequestMapping(path = "/activation/{userId}/{code}",method = RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId") int userId,@PathVariable("code") String code) {
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS) {
            model.addAttribute("msg","激活成功，正常使用了");
            model.addAttribute("target","/login");
        } else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg","无效操作，该账号已经激活过了");
            model.addAttribute("target","/login");
        }else {
            model.addAttribute("msg","激活失败，您提供的激活链接不正确");
            model.addAttribute("target","/login");
        }
        return "/site/operate-result";
    }

    /**
     * 生成验证码并转化成图片
     * @param response
     * @param session
     */
    @RequestMapping(path = "/kaptcha",method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response, HttpSession session){
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);
        //将验证码存入session
       // session.setAttribute("kaptcha",text);
        //验证码的归属者 随机生成的字符串
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner",kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //验证码存入Redis
        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);

        //将图片输出给浏览器
        response.setContentType("image/png");
        try {
            OutputStream outputStream = response.getOutputStream();
            ImageIO.write(image,"png",outputStream);
        } catch (IOException e) {
            logger.error("响应验证码失败："+e.getMessage());
        }

    }

    @RequestMapping(path = "/login",method = RequestMethod.POST)
    public String login(String username, String password, String code, boolean rememberme,
                        Model model,/*HttpSession session,*/HttpServletResponse response,
                        @CookieValue("kaptchaOwner") String kaptchaOwner){

        //检查验证码 equalsIgnoreCase验证码忽略大小写
        //String  kaptcha = (String) session.getAttribute("kaptcha");
        String kaptcha = null;
        if (StringUtils.isNotBlank(kaptchaOwner)){
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha  = (String) redisTemplate.opsForValue().get(redisKey);
        }

        if (StringUtils.isBlank(kaptcha)||StringUtils.isBlank(code)||!kaptcha.equalsIgnoreCase(code)){

            model.addAttribute("codeMsg","验证码不正确！");
            return "/site/login";
        }

        //检查账号密码
        int expiredSecond = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String,Object> map = userService.login(username,password,expiredSecond);
        if (map.containsKey("ticket")){
            Cookie cookie = new Cookie("ticket",map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSecond);
            response.addCookie(cookie);
            return "redirect:/index";
        }else{
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @RequestMapping(path = "/logout",method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }




}
